change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/crypto/cfb.c
..
..
@@ -20,33 +20,23 @@
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20
  */
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21
 
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22
 #include <crypto/algapi.h>
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+#include <crypto/internal/cipher.h>
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 #include <crypto/internal/skcipher.h>
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 #include <linux/err.h>
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 #include <linux/init.h>
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 #include <linux/kernel.h>
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 #include <linux/module.h>
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-#include <linux/slab.h>
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 #include <linux/string.h>
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-#include <linux/types.h>
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-
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-struct crypto_cfb_ctx {
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-	struct crypto_cipher *child;
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-};
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30
 
36
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 static unsigned int crypto_cfb_bsize(struct crypto_skcipher *tfm)
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32
 {
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-	struct crypto_cfb_ctx *ctx = crypto_skcipher_ctx(tfm);
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-	struct crypto_cipher *child = ctx->child;
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-
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-	return crypto_cipher_blocksize(child);
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+	return crypto_cipher_blocksize(skcipher_cipher_simple(tfm));
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34
 }
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35
 
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36
 static void crypto_cfb_encrypt_one(struct crypto_skcipher *tfm,
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37
 					  const u8 *src, u8 *dst)
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38
 {
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-	struct crypto_cfb_ctx *ctx = crypto_skcipher_ctx(tfm);
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-
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-	crypto_cipher_encrypt_one(ctx->child, dst, src);
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+	crypto_cipher_encrypt_one(skcipher_cipher_simple(tfm), dst, src);
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40
 }
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41
 
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42
 /* final encrypt and decrypt is the same */
..
..
@@ -186,22 +176,6 @@
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 		return crypto_cfb_decrypt_segment(walk, tfm);
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177
 }
188
178
 
189
-static int crypto_cfb_setkey(struct crypto_skcipher *parent, const u8 *key,
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-			     unsigned int keylen)
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-{
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-	struct crypto_cfb_ctx *ctx = crypto_skcipher_ctx(parent);
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-	struct crypto_cipher *child = ctx->child;
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-	int err;
195
-
196
-	crypto_cipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
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-	crypto_cipher_set_flags(child, crypto_skcipher_get_flags(parent) &
198
-				       CRYPTO_TFM_REQ_MASK);
199
-	err = crypto_cipher_setkey(child, key, keylen);
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-	crypto_skcipher_set_flags(parent, crypto_cipher_get_flags(child) &
201
-					  CRYPTO_TFM_RES_MASK);
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-	return err;
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-}
204
-
205
179
 static int crypto_cfb_decrypt(struct skcipher_request *req)
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180
 {
207
181
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
..
..
@@ -224,79 +198,20 @@
224
198
 	return err;
225
199
 }
226
200
 
227
-static int crypto_cfb_init_tfm(struct crypto_skcipher *tfm)
228
-{
229
-	struct skcipher_instance *inst = skcipher_alg_instance(tfm);
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-	struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
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-	struct crypto_cfb_ctx *ctx = crypto_skcipher_ctx(tfm);
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-	struct crypto_cipher *cipher;
233
-
234
-	cipher = crypto_spawn_cipher(spawn);
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-	if (IS_ERR(cipher))
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-		return PTR_ERR(cipher);
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-
238
-	ctx->child = cipher;
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-	return 0;
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-}
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-
242
-static void crypto_cfb_exit_tfm(struct crypto_skcipher *tfm)
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-{
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-	struct crypto_cfb_ctx *ctx = crypto_skcipher_ctx(tfm);
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-
246
-	crypto_free_cipher(ctx->child);
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-}
248
-
249
-static void crypto_cfb_free(struct skcipher_instance *inst)
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-{
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-	crypto_drop_skcipher(skcipher_instance_ctx(inst));
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-	kfree(inst);
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-}
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-
255
201
 static int crypto_cfb_create(struct crypto_template *tmpl, struct rtattr **tb)
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202
 {
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203
 	struct skcipher_instance *inst;
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-	struct crypto_attr_type *algt;
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-	struct crypto_spawn *spawn;
260
204
 	struct crypto_alg *alg;
261
-	u32 mask;
262
205
 	int err;
263
206
 
264
-	err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER);
265
-	if (err)
266
-		return err;
207
+	inst = skcipher_alloc_instance_simple(tmpl, tb);
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+	if (IS_ERR(inst))
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+		return PTR_ERR(inst);
267
210
 
268
-	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
269
-	if (!inst)
270
-		return -ENOMEM;
211
+	alg = skcipher_ialg_simple(inst);
271
212
 
272
-	algt = crypto_get_attr_type(tb);
273
-	err = PTR_ERR(algt);
274
-	if (IS_ERR(algt))
275
-		goto err_free_inst;
276
-
277
-	mask = CRYPTO_ALG_TYPE_MASK |
278
-		crypto_requires_off(algt->type, algt->mask,
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-				    CRYPTO_ALG_NEED_FALLBACK);
280
-
281
-	alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, mask);
282
-	err = PTR_ERR(alg);
283
-	if (IS_ERR(alg))
284
-		goto err_free_inst;
285
-
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-	spawn = skcipher_instance_ctx(inst);
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-	err = crypto_init_spawn(spawn, alg, skcipher_crypto_instance(inst),
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-				CRYPTO_ALG_TYPE_MASK);
289
-	if (err)
290
-		goto err_put_alg;
291
-
292
-	err = crypto_inst_setname(skcipher_crypto_instance(inst), "cfb", alg);
293
-	if (err)
294
-		goto err_drop_spawn;
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-
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-	inst->alg.base.cra_priority = alg->cra_priority;
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-	/* we're a stream cipher independend of the crypto cra_blocksize */
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+	/* CFB mode is a stream cipher. */
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214
 	inst->alg.base.cra_blocksize = 1;
299
-	inst->alg.base.cra_alignmask = alg->cra_alignmask;
300
215
 
301
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 	/*
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217
 	 * To simplify the implementation, configure the skcipher walk to only
..
..
@@ -304,36 +219,14 @@
304
219
 	 */
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220
 	inst->alg.chunksize = alg->cra_blocksize;
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221
 
307
-	inst->alg.ivsize = alg->cra_blocksize;
308
-	inst->alg.min_keysize = alg->cra_cipher.cia_min_keysize;
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-	inst->alg.max_keysize = alg->cra_cipher.cia_max_keysize;
310
-
311
-	inst->alg.base.cra_ctxsize = sizeof(struct crypto_cfb_ctx);
312
-
313
-	inst->alg.init = crypto_cfb_init_tfm;
314
-	inst->alg.exit = crypto_cfb_exit_tfm;
315
-
316
-	inst->alg.setkey = crypto_cfb_setkey;
317
222
 	inst->alg.encrypt = crypto_cfb_encrypt;
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223
 	inst->alg.decrypt = crypto_cfb_decrypt;
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224
 
320
-	inst->free = crypto_cfb_free;
321
-
322
225
 	err = skcipher_register_instance(tmpl, inst);
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226
 	if (err)
324
-		goto err_drop_spawn;
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-	crypto_mod_put(alg);
227
+		inst->free(inst);
326
228
 
327
-out:
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229
 	return err;
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-
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-err_drop_spawn:
331
-	crypto_drop_spawn(spawn);
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-err_put_alg:
333
-	crypto_mod_put(alg);
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-err_free_inst:
335
-	kfree(inst);
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-	goto out;
337
230
 }
338
231
 
339
232
 static struct crypto_template crypto_cfb_tmpl = {
..
..
@@ -352,9 +245,10 @@
352
245
 	crypto_unregister_template(&crypto_cfb_tmpl);
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 }
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247
 
355
-module_init(crypto_cfb_module_init);
248
+subsys_initcall(crypto_cfb_module_init);
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249
 module_exit(crypto_cfb_module_exit);
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250
 
358
251
 MODULE_LICENSE("GPL");
359
-MODULE_DESCRIPTION("CFB block cipher algorithm");
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+MODULE_DESCRIPTION("CFB block cipher mode of operation");
360
253
 MODULE_ALIAS_CRYPTO("cfb");
254
+MODULE_IMPORT_NS(CRYPTO_INTERNAL);